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Edta
- Thread starter hasan66
- Start date
Hi all,
cheers Darrel
Are you sure you need it?
The easiest would be disodium EDTA, the copper (Cu++) (from copper sulphate (CuSO4.5H2O)). You would end up with copper II disodium EDTA, which the product normally retailed. You could use EDTA on its own, but that would involve mixing in an ammonium salt or similar.
cheers Darrel
I already use copper sulphate without chelation. I will chelate 500gr copper sulphate. I just want to try it. According to the calculation, approximately 733.71 grams of sodium edta is required. Would sodium edta alone be enough to chelate and is ammonium salt necessary as we said? Thanks Darrel
I already use non-chelated copper sulfate. I will chelate 500 grams of copper sulfate. I just want to try it. According to the calculation, approximately 733.71 grams of sodium edta is needed. Would sodium edta alone be enough to make the chelation and is ammonium salt necessary as you said?
Hi all,
cheers Darrel
You need a proper chemist, but I think that you can just use disodium EDTA and copper source.
cheers Darrel
Teşekkürler Darrel
Okay Darrel I think I will ask another question, this edta is different from di sodium edta, the molar value of di sodium edta is 338.23g (Edta-Ethylene diamine tetra acetic acid C10H16N208 - 292.24 g/mol) can this edta with this molar value be used for chelating?
@hasan66
249.6850 Molar mass of CuSO4*5H2O
292.2426 Molar mass of EDTA
1 gram CuSO4*5H2O / 249.6850 Molar mass of CuSO4*5H2O = 0.004 mol
0.004 mol X 292.2426 Molar mass of EDTA = 1.168 gram EDTA
1 gram CuSO4*5H2O and 1.168 gram EDTA is needed to fully chelate the Copper to Cu EDTA
I wouldn't recommend attempting such mix below but here it is:
500 gram CuSO4*5H2O / 249.6850 Molar mass of CuSO4*5H2O = 2.002 mol
2.002 mol X 292.2426 Molar mass of EDTA = 585 gram EDTA
500 gram CuSO4*5H2O and 585 gram EDTA is needed to fully chelate the Copper to Cu EDTA
I would add 20% additional EDTA just to be safe
249.6850 Molar mass of CuSO4*5H2O
292.2426 Molar mass of EDTA
1 gram CuSO4*5H2O / 249.6850 Molar mass of CuSO4*5H2O = 0.004 mol
0.004 mol X 292.2426 Molar mass of EDTA = 1.168 gram EDTA
1 gram CuSO4*5H2O and 1.168 gram EDTA is needed to fully chelate the Copper to Cu EDTA
I wouldn't recommend attempting such mix below but here it is:
500 gram CuSO4*5H2O / 249.6850 Molar mass of CuSO4*5H2O = 2.002 mol
2.002 mol X 292.2426 Molar mass of EDTA = 585 gram EDTA
500 gram CuSO4*5H2O and 585 gram EDTA is needed to fully chelate the Copper to Cu EDTA
I would add 20% additional EDTA just to be safe
if you end up using this, the molar mass is 380.17
249.6850 Molar mass of CuSO4*5H2O
380.17 Molar mass of C10H12N2Na4O8 (Tetrasodium Ethylenediaminetetraacetate)
1 gram CuSO4*5H2O / 249.6850 Molar mass of CuSO4*5H2O = 0.004 mol
0.004 mol X 380.17 Molar mass of C10H12N2Na4O8 = 1.52 gram C10H12N2Na4O8
1 gram CuSO4*5H2O and 1.52 gram C10H12N2Na4O8 is needed to fully chelate the Copper to Cu EDTA
I wouldn't recommend attempting such mix below but here it is:
500 gram CuSO4*5H2O / 249.6850 Molar mass of CuSO4*5H2O = 2.002 mol
2.002 mol X 380.17 Molar mass of C10H12N2Na4O8 = 761 gram C10H12N2Na4O8
500 gram CuSO4*5H2O and 761 gram C10H12N2Na4O8 is needed to fully chelate the Copper to Cu EDTA
I would add 20% additional EDTA just to be safe
Last edited:
The main issue is that EDTA requires a pH adjustment to dissolve, as it is typically not very soluble at lower pH. To fully dissolve it, you may need to raise the pH. However, you can bypass this step by using disodium EDTA or tetrasodium ethylenediaminetetraacetate, as these forms are already soluble.
Ammonium is not strictly necessary to dissolve EDTA; alternatives like KHCO₃ (potassium bicarbonate) can also be used, but the process becomes more complex.
Actually, it's hard work, but you got me into this trouble.😁
From now on I will work with sodium gluconate
Oh please, don’t blame me now! You were the one who said, ‘You also want to dive deep into nutrients!’ Well, guess what? You’re swimming in it now! 😂
Yes you can play around with that as well.